SPONSORED LINKS

89 1/2 ton sub 4X4 5.7 check engine light wont come on

Tiny
CSMO
  • MEMBER
  • 1989 CHEVROLET SUBURBAN
Bulb was burned out. Replaced with 4x4 indicator bulb and it still dont come on. One side of socket does get power. Otherside does not but if I put my test light on it then bulb comes on. Any ideas?
Sunday, November 27th, 2011 AT 4:50 AM

7 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Check the socket. It may be damaged, corroded.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
-1
Sunday, November 27th, 2011 AT 4:55 AM
Tiny
CSMO
  • MEMBER
  • 4 POSTS
Socket is good. If put in other area works fine
Was this
answer
helpful?
Yes
No
+1
Sunday, November 27th, 2011 AT 5:08 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
If there is power to the socket, then the ground needs to be missing. Otherwise the light would have to come on.
Was this
answer
helpful?
Yes
No
+1
Sunday, November 27th, 2011 AT 5:16 AM
Tiny
CSMO
  • MEMBER
  • 4 POSTS
Ok, there is two wires from the instrument harness cluster going to the socket. Pink/white & brown/white. Pink/white seems to be hot all the time. So that makes brown/white the ground? But if I ground that wont the light stay on and not switch off after motor starts? And thank you very much for the help!
Was this
answer
helpful?
Yes
No
Monday, November 28th, 2011 AT 3:54 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
That would make sense. There is a chance the hot wire is on because the light should be on. It does go off when you turn the key off, correct?
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Monday, November 28th, 2011 AT 4:38 AM
Tiny
CSMO
  • MEMBER
  • 4 POSTS
Well the light dont come on at all except if I ground out the brown/white wire with my test light.I have not tried turning the key off when it is grounded though. The brown/white wire goes to the ECM according to my schematics, but if im understanding right its just a ground and wont cause a problem with the ECM. Another question, I have low fuel pressure, would a relay cause that or is the problem at the pump?
Was this
answer
helpful?
Yes
No
Wednesday, November 30th, 2011 AT 4:16 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
You would have to check voltage to the pump.
Was this
answer
helpful?
Yes
No
Wednesday, November 30th, 2011 AT 5:05 AM

Please login or register to post a reply.

Related Check Engine Light Content

Code Read Retrieval/Clear Chevrolet
VIDEO
Code Read Retrieval/Clear Chevrolet
Instructional repair video
Check Engine Light
GUIDE
Check Engine Light
Why is my check engine or service engine soon turned on? In this guide we talk about what this is associated with this notorious light, what it is used for and what you...
VIEW MORE

Sponsored links